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v'(.IIIl-oael.) l Y G. JACKSON.

l HINGE. No. 368,921. l Patented Aug. 2s, 1887,

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` UNITED STATES PATENT EEIOE.`

GEORGE JACKSON, OE NEW YORK, n. Y., AssIGNOE OE ONE-HALE TO JOHN H. EoswELL, OE sAME rLAOE.

HINGE.

SPBCIFICATON forming part of Letters Patent No. 368,921, dated .August 23, 1887.

l Application filed October 26, 1886. Serial No. 217,287. (Model.)

` To @ZZ whom it may concern.-

Beit known that I, GEORGE JACKSON, 'a subject of the Queen'of Great Britain, and a resident ofthe city,county,and State of New York, have invented a new and useful Improvement in Hinges, of which the following is a specilication.

My invention relates to that class of hinges which are concealed; and the object ofniy in- Io vention is to so construct a hinge that when it is applied to a door or other location it will, when the door or part is closed, be entirely concealed from view, and likewise protected from exterior interference. The difficulty eX- perienced in constructing such ahinge is that, in the case ofa door for instance, the door is often located within `the jamb and door-casing, instead of being iush therewith, and when the door is opened the hinges which support zo it must be arranged to swing the door itself vclear of the casing and the molding-pieces. With the ordinary folding-hinge a considerable portion extends outwardly beyond the casing, and hence when the door is opened it is moved Outward, and thus clears the molding on the door-casing.

In my present device I accomplish the same result without having any portion of the hinge beyond the casing or in view.

In the accompanying drawings, which illustrate my invention, similar letters of reference indicate like parts.

Figure lis a perspective view from the Vfront of the hinge attached to a door-jamb and door, andV showing the door open. A part of the door-jamb is broken away to show the depth of the hingecase, and a part of hinge-'plate attached to the door is also broken away to show the point of attach ment of the lever. Fig.

4o 2 is a front View ofthe hinge wide open. Fig.

3 is a horizontal section on the line x of Fig..

2.' Fig. 4 is also a horizontal section on the same line, but showing the hinge closed.

In the drawings, A is the door, B the door casing or jamb, and C molding on the front of the door-casing. To apply the hinge thejamb B is out out substantially to the shape of the metal hinge-case D, thebottom plate,E, of which is inclined from without inward and down- 5o ward, and attached to and forming a part of the sides of the case are the guides F. When the hinge-case is in position in the jamb, the face and surface fastening ends G G of the case are flush with the surface of the jamb.

Arranged to slide over the bottom plate, E, 5 5 and below the guides F is a sliding hinge-plate,

H, provided with the arms I I, which project beyond the plate and are bent slightly backward. The ends of the arms are bored to receive the pin J.

K is the strap or hinge-plate, which is fastened to the door, and on the side are the knuckles L, bored to receive the pin J. The surface of the plate is out away opposite to where the arms I I connect with the knuckles L. 'lhisis 65 to compensate for the bend in the arms I I when the hinge is closed. Through the centery of the strap or plate is an oblong opening, M, and on either side ofthe opening on the under side of the plate are the webs N N.l Through 7o the web is bored a hole to receive a pin, O, which also passes through one end of the bent lever l?. The other end of the bent lever is forked and is connected by a pin to the leverarm Q, forming a part of the toothed wheel R. 7 5 The wheel R, which is provided with teeth on a portion of its periphery,is supported in bearings vS, forming a part of the sliding plate H. Through the plate H is cut the opening T,and below and on a line with this opening and cor- 8o responding with the teeth of the wheel are the openings U.

rIhe operation of the device will be readily understood. Whenthedooris closed,theparts are in the position and bear relation to each other as shown in Fig. 4. rIhe plateH is well within the hinge-case and the arm Q. well over to the left. When the door is opened,the bent lever P, its motion 4being slow, actuates the arm Q of the wheel, the teeth of which, bear- 9o ing on the sides ofthe Openings in the bottom plate, slowly move theplate H forward just far enough to carry the end of the door beyond the surface of the door-casing, so that it can be opened wide-that is, turned back parallel 95 with the wall.

The hinge proper, it will be observed, is not fastened to the jamb, as itis with all other hinges, but slides freely in the hinge-case. The mechanism which moves the hinge-plate roo in and out is that which I now consider best vadapted to the purpose. I, however, do not Wish to be limited to the particular mechanism shown, as modifications can be made therein which will serve the same purpose-z. e., to move out and in the sliding plate as the door is opened and shut-Without departing from the intent of my invention.

I have described the hinge as applied to a door. It may, however, be used in any other locality to which it is adapted. I have also made various niodications therein, such as the combination with a spring whereby the door will be automatically closed, &e. and which I reserve the right to make subjects of application to be hereafter filed.

I claim as my invention- A hinge comprising a hinge-case, a sliding plate, a hinge-plate attached to thc door and GEORGE JACKSON. \Vitncsses: l

A. E. SnxToN, GEO. H. BENJAMIN. 

